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Diffstat (limited to 'src/mongo/db/transaction_metrics_observer.cpp')
| -rw-r--r-- | src/mongo/db/transaction_metrics_observer.cpp | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/mongo/db/transaction_metrics_observer.cpp b/src/mongo/db/transaction_metrics_observer.cpp new file mode 100644 index 00000000000..57143824bbb --- /dev/null +++ b/src/mongo/db/transaction_metrics_observer.cpp @@ -0,0 +1,171 @@ +/** + * Copyright (C) 2018 MongoDB Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License, version 3, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * As a special exception, the copyright holders give permission to link the + * code of portions of this program with the OpenSSL library under certain + * conditions as described in each individual source file and distribute + * linked combinations including the program with the OpenSSL library. You + * must comply with the GNU Affero General Public License in all respects + * for all of the code used other than as permitted herein. If you modify + * file(s) with this exception, you may extend this exception to your + * version of the file(s), but you are not obligated to do so. If you do not + * wish to do so, delete this exception statement from your version. If you + * delete this exception statement from all source files in the program, + * then also delete it in the license file. + */ + +#include "mongo/platform/basic.h" + +#include "mongo/db/transaction_metrics_observer.h" + +#include "mongo/db/server_transactions_metrics.h" +#include "mongo/db/transaction_participant.h" + +namespace mongo { + +void TransactionMetricsObserver::onStart(ServerTransactionsMetrics* serverTransactionsMetrics, + unsigned long long curTime) { + // + // Per transaction metrics. + // + _singleTransactionStats.setStartTime(curTime); + + // + // Server wide transactions metrics. + // + serverTransactionsMetrics->incrementTotalStarted(); + serverTransactionsMetrics->incrementCurrentOpen(); + serverTransactionsMetrics->incrementCurrentInactive(); +} + +void TransactionMetricsObserver::onStash(ServerTransactionsMetrics* serverTransactionsMetrics, + unsigned long long curTime) { + // + // Per transaction metrics. + // + // The transaction operation may be trying to stash its resources when it has already been + // aborted by another thread, so we check that the transaction is active before setting it as + // inactive. + if (_singleTransactionStats.isActive()) { + _singleTransactionStats.setInactive(curTime); + } + + // + // Server wide transactions metrics. + // + // We accept possible slight inaccuracies in these counters from non-atomicity. + serverTransactionsMetrics->decrementCurrentActive(); + serverTransactionsMetrics->incrementCurrentInactive(); +} + +void TransactionMetricsObserver::onUnstash(ServerTransactionsMetrics* serverTransactionsMetrics, + unsigned long long curTime) { + // + // Per transaction metrics. + // + _singleTransactionStats.setActive(curTime); + + // + // Server wide transactions metrics. + // + // We accept possible slight inaccuracies in these counters from non-atomicity. + serverTransactionsMetrics->incrementCurrentActive(); + serverTransactionsMetrics->decrementCurrentInactive(); +} + +void TransactionMetricsObserver::onCommit(ServerTransactionsMetrics* serverTransactionsMetrics, + unsigned long long curTime, + Top* top) { + // + // Per transaction metrics. + // + // After the transaction has been committed, we must update the end time and mark it as + // inactive. We use the same "now" time to prevent skew in the time-related metrics. + _singleTransactionStats.setEndTime(curTime); + // The transaction operation may have already been aborted by another thread, so we check that + // the transaction is active before setting it as inactive. + if (_singleTransactionStats.isActive()) { + _singleTransactionStats.setInactive(curTime); + } + + // + // Server wide transactions metrics. + // + serverTransactionsMetrics->incrementTotalCommitted(); + serverTransactionsMetrics->decrementCurrentOpen(); + serverTransactionsMetrics->decrementCurrentActive(); + + top->incrementGlobalTransactionLatencyStats(_singleTransactionStats.getDuration(curTime)); +} + +void TransactionMetricsObserver::onAbortActive(ServerTransactionsMetrics* serverTransactionsMetrics, + unsigned long long curTime, + Top* top) { + _onAbort(serverTransactionsMetrics, curTime, top); + // + // Per transaction metrics. + // + // The transaction operation may have already been aborted by another thread, so we check that + // the transaction is active before setting it as inactive. + if (_singleTransactionStats.isActive()) { + _singleTransactionStats.setInactive(curTime); + } + + // + // Server wide transactions metrics. + // + serverTransactionsMetrics->decrementCurrentActive(); +} + +void TransactionMetricsObserver::onAbortInactive( + ServerTransactionsMetrics* serverTransactionsMetrics, unsigned long long curTime, Top* top) { + _onAbort(serverTransactionsMetrics, curTime, top); + + // + // Server wide transactions metrics. + // + serverTransactionsMetrics->decrementCurrentInactive(); +} + +void TransactionMetricsObserver::onTransactionOperation(Client* client, + OpDebug::AdditiveMetrics additiveMetrics) { + // Add the latest operation stats to the aggregate OpDebug::AdditiveMetrics object stored in the + // SingleTransactionStats instance on the TransactionMetricsObserver. + _singleTransactionStats.getOpDebug()->additiveMetrics.add(additiveMetrics); + + // Update the LastClientInfo object stored in the SingleTransactionStats instance on the + // TransactionMetricsObserver with this Client's information. This is the last client that ran a + // transaction operation on the txnParticipant. + _singleTransactionStats.updateLastClientInfo(client); +} + +void TransactionMetricsObserver::_onAbort(ServerTransactionsMetrics* serverTransactionsMetrics, + unsigned long long curTime, + Top* top) { + // + // Per transaction metrics. + // + _singleTransactionStats.setEndTime(curTime); + + // + // Server wide transactions metrics. + // + serverTransactionsMetrics->incrementTotalAborted(); + serverTransactionsMetrics->decrementCurrentOpen(); + + top->incrementGlobalTransactionLatencyStats(_singleTransactionStats.getDuration(curTime)); +} + +} // namespace mongo |